Porting Borland TurboCsource code to GNU gcc
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TurboC in a nutshellTurboC is a linkable library and a set of C header files that make iteasier to port C code originally written for Borland's MS-DOS basedTurbo C compiler to GNU
Why was TurboC created?
Features and Deficiencies of TurboC
Download and Install TurboC
Mac OS X
What's with the cute logo?
VC would be installed in 'C: Program Files Microsoft Visual Studio 10.0 VC', with headers in sub-directory 'include' and libraries in 'lib'. Windows SDK which includes OpenGL and GLU (OpenGL Utility). The Visual C 2010 Express bundles the Microsoft Windows SDK, which would be installed in 'C: Program Files Microsoft SDKs Windows v7.0A. When writing a code in C language, compiling it will be the most important step as the code can be run only after that. There are many C compilers for windows 7 64-bit available that can be used for this purpose. C compiler for windows 8 can be used on the Windows 8 platform and works the same way as any C compiler for windows free download.gcc -- and therefore to a wide varietyof *nix computer platforms. Generally speaking, it is thefollowing:
- An implementation via ncurses of conio.h from Turbo C.
- An implementation via Xlib of graphics.h from Turbo C.
- A few other functions and time-saving features thrown in forconvenience.
- A means of overcoming the integer datatype discrepancies betweenTurbo C and GNU gcc.
TurboC is available as free softwareunder the GNU Lesser General Public License (LGPL).I have written quite a lot of MS-DOS based software using Borland'sTurbo C 2.0 compiler. When the inclination finally hit me to makesome ofthis otherwise-deceased code available as free software, my firstinnocent idea was to release it under the GPL, simply labeling ithonestly as MS-DOS code, and then later to port the code to *nix astime and interest permitted. It was obvious that directly portingto *nix up-front would be a time-consuming task.
But I ran into a snag. It's no good to release software ifthere's no way for anybody to find out about it. My preferredchannel for announcingopen-source software is freshmeat,butfreshmeat doesn't 'do' MS-DOS (and therefore politely declined toaccept my MS-DOS projects).
Apparently, necessity really is the mother of invention. Itoccurred to me that if I could provide appropriate Turbo C compatiblelibraries andheader files, then the effort of porting Turbo C code to *nix would begreatlysimplified. In other words, it would be relatively easyto provide*nix versions of the old MS-DOS code. Whether it's absolutelyeasy or not depends a lot on the program you're trying to port.For conio.h functionality, you might consider Pablo Vidal's UConio libraryinstead. I've not used it, and don't know its advantages anddisadvantages. It certainly supports a much smaller subset of conio functionality thanTurboC,and requires you to modify your source code much more extensively.
Borland supposedly has (or willsoonhave) a Linux version of their C++ compiler. At this point, thenature,price, and target platforms of this compiler are mysteries. One presumes that (like Kylix) itwillbe Wine-based, and therefore willworkonly on 'x86 systems. Nevertheless, if it contains the variouslibraryfunctions implemented in the TurboC library -- and frankly, that's a verybig 'if' -- it might provide a simpler means of porting your TurboCprograms to Linux. Speaking for myself, even though I have been along-timeBorland user, I philosophically prefer to compile my program with GNU gcc.
For graphics.h functionality, there is the GRX library of Csaba Biegl,MichaelGoffioul, and Hartmut Schirmer. I didn't discover this libraryuntilI had only a few graphics.h functions left to write, and I haven'tfullyevaluated it. Its stated aim is to be a multi-platform 2Dgraphicslibrary. Its website does not advertise (or even mention) Turbo Ccompatibility. However, it contains quite a few functions of the same name (and,apparently,the same functionality) as Turbo C library functions.
Of course, if you are only interested running your programon *nixsystems -- as opposed to porting the program to *nix systems ingeneral-- you might be able to simply run your existing executable using oneofthe freely available DOS emulators for Linux. DOS emulation usingdosemu with freedos works very well on 'x86 systems,while bochs with freedos works well (if somewhat slowly) onnon-'x86*nix systems.
- TurboC provides most of the console-i/o functionality of TurboC'sconio.h header, mapping it to related ncurses functionality. (Currently, every conio function except cscanf is supported.)
- TurboC provides most of the 'BGI' functionality of Turbo C'sgraphics.h header. At present (20020608), implementation of thesefeatures is mostlycomplete except for the temporary lack of stroked-font support.
- TurboC provides a sprinkling of other missing functionality likethe strupr and strlwr functions.
- Check out the complete list ofavailable functions.
- Refer to the complete list of bugs andissues. So far, the library is only as complete as it needs to befor the kind of programs I typically used to write in Turbo C. AsI port more of myold programs to *nix, the TurboC libraray will presumably become morecomplete. Presently, support for conio.h is essentially complete, and support forgraphics.his essentially complete except for displaying text.
- In the ported program, the text-console window is logicallysizedproperly, but is not physically sized properly unless xterm isused. If other terminals are used (such as KDE Konsole),the window must be resized manually by the user.
- Borland's Turbo C is a 16-bit compiler, whereas the GNU gcccompiler I'm targeting is 32-bit. This results in a discrepancyinthe integer datatypes. TurboC handles the (hopefully) most commoncasesby means of macros; unhandled cases will cause compile-time errors andmustbe fixed manually. This is covered in detail on the usage page.
- Mixing and matching stream-based functionality (like getchar,printf, and so on) with 'console' based functionality (like getch, cprintf, and so on) probably won't work. Again,look at the usage page.